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First Grade Common Core Math 1 NBT.5 Mentally Find 10 More or 10 Less 1.NBT.5 Practice provides two ways for students to practice solving place value word problems that require mentally finding 10 more or 10 less than a given number.

It includes 40 distinct problems in two sets (129 slides in all!), with and without following answer slides. The PowerPoint file can be used on computers, or Promethean Activboard and Smart boards.

Take a look at the preview file and buy today for your students benefit!

Standard 1.NBT.5 Use place value understanding and properties of operations to add and subtract.

5. Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.